NERVOUS TISSUE. 271 



tern consists of a chain of ganglia on each side of the 

 spinal column, connected with each other and with the 

 cerebro-spinal axis. It is the system of organic life, and 

 hence controls the development, growth, and nutrition 



FIG. 116. GANGLIONIC CELL AND BRANCHING FIBRES. 



st, cell body ; m, nucleus : me. nucleolus ; pn, protoplasmic prolongations ; tf, axis- 

 cylinder fibres ; tn, axis-cylinder prolongations. 



of the body, while the cerebro-spinal system is the system 

 of animal life and brings the individual into relations 

 with the exterior world through his special senses and 

 the operations of his reason and will. 



